Panasonic MN103001G/F01K - Manual (Page 395)

I/O Ports
15-29
15.7 Port 5
15.7.1 Block Diagram
Figs. 15-7-1 to 15-7-5 show block diagrams for port 5.
Fig. 15-7-1 Port 5 Block Diagram (P55)
Internal data bus
P5OUT
P55O
TM13IO
M
P
X
P55
M
P
X
P... Represents one bit of each register.
P55I
P5IN
TM13IO/TM5IO
TM5IO
P5DIR
P55D
P55M
P5MD
P55S
P5SS
M
P
X
SBO3